shithub: libvpx

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Localize zero_motion_accumulator

Change-Id: Ib4d37667c217cb06e6941de7b3204ba71b880396

--- a/vp9/encoder/vp9_firstpass.c

+++ b/vp9/encoder/vp9_firstpass.c

@@ -2496,8 +2496,6 @@

   double gf_group_inter = 0.0;

   double gf_group_motion = 0.0;

-  double zero_motion_accumulator = 1.0;

-

   unsigned int allow_alt_ref = is_altref_enabled(cpi);

   int active_max_gf_interval;

@@ -2584,6 +2582,7 @@

     // Motion breakout threshold for loop below depends on image size.

     double mv_ratio_accumulator_thresh =

         (cpi->initial_height + cpi->initial_width) / 4.0;

+    double zero_motion_accumulator = 1.0;

     while (i < rc->static_scene_max_gf_interval && i < rc->frames_to_key) {

       const FIRSTPASS_STATS *next_next_frame;

@@ -2670,6 +2669,7 @@

         break;

       }

     }

+    allow_alt_ref &= zero_motion_accumulator < 0.995;

   }

   // Was the group length constrained by the requirement for a new KF?

@@ -2676,8 +2676,7 @@

   rc->constrained_gf_group = (i >= rc->frames_to_key) ? 1 : 0;

   // Should we use the alternate reference frame.

-  if ((zero_motion_accumulator < 0.995) && allow_alt_ref &&

-      (twopass->kf_zeromotion_pct < STATIC_KF_GROUP_THRESH) &&

+  if (allow_alt_ref && (twopass->kf_zeromotion_pct < STATIC_KF_GROUP_THRESH) &&

       (i < cpi->oxcf.lag_in_frames) && (i >= rc->min_gf_interval)) {

     const int f_frames = (rc->frames_to_key - i >= i - 1)

                              ? i - 1